[WASM] Eliminate SIMD boolean vector types.

src/machine-type.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/machine-type.h"
 #include "src/ostreams.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 14 matching lines @@
     case MachineRepresentation::kWord32:
       return "kRepWord32";
     case MachineRepresentation::kWord64:
       return "kRepWord64";
     case MachineRepresentation::kFloat32:
       return "kRepFloat32";
     case MachineRepresentation::kFloat64:
       return "kRepFloat64";
     case MachineRepresentation::kSimd128:
       return "kRepSimd128";
-    case MachineRepresentation::kSimd1x4:
-      return "kRepSimd1x4";
-    case MachineRepresentation::kSimd1x8:
-      return "kRepSimd1x8";
-    case MachineRepresentation::kSimd1x16:
-      return "kRepSimd1x16";
     case MachineRepresentation::kTaggedSigned:
       return "kRepTaggedSigned";
     case MachineRepresentation::kTaggedPointer:
       return "kRepTaggedPointer";
     case MachineRepresentation::kTagged:
       return "kRepTagged";
   }
   UNREACHABLE();
 }
 
@@ skipping 28 matching lines @@
   } else if (type.semantic() == MachineSemantic::kNone) {
     return os << type.representation();
   } else {
     return os << type.representation() << "|" << type.semantic();
   }
   return os;
 }
 
 }  // namespace internal
 }  // namespace v8